不同湿度条件下伊犁黄土湿陷性与压缩量的关系

新疆伊犁河流域的黄土,不同于西北台塬地区的黄土,为了解该地区黄土湿陷性与压缩量的关系,依托新疆伊犁河流域阿克达拉水电站引水渠道工程,现场提取不同埋深的原状黄土,在室内进行了不同湿度条件下黄土的湿陷性试验,分析了不同湿度条件下湿陷性随压力变化的规律及湿陷比例与压缩比例的变化规律。结果表明,在土样湿度相同时,同一深度的土样湿陷系数随压缩模量的增大而减小;在施加相同压力条件下,压缩模量随土样湿度增大而减小,湿陷比例的大小与土的湿度变化呈负相关,而土样压缩比例随湿度增加呈正相关。

Relationship between Humidification and Compression of Yili Loess under Different Humidity Conditions

The loess in the Yili River Basin of Xinjiang is different from that of tableland and plateau in the Northwest region. In order to discover the relationship between the collapsibility and compression of the loess in this area, relying on the channel water diversion project of Akdara Hydropower Station in the Yili River Basin of Xinjiang, the intact loess with different buried depth was extracted on the spot site, and the collapsibility test of loess under different humidity conditions was carried out in the laboratory. The variation of collapsibility with pressure and the ratio of collapsibility to compression under different humidity conditions were analyzed. The results show that when the humidity of the soil was the same, the collapsibility coefficient of the soil sample was decreased with the increase of the compression modulus, and the compression modulus was decreased with the increase of the humidity of the soil sample under the same pressure, as well as the collapsibility ratio was negatively correlated with the change of the humidity of the soil, while the compression ratio of the soil sample was positively correlated with the increase of the humidity.